Notes payable and long-term debt - Components of Notes Payable (Details) - USD ($) $ in Millions	Oct. 02, 2021	Jan. 02, 2021
Short-term Debt [Line Items]
Short-term Debt	$ 497	$ 102
U.S. commercial paper
Short-term Debt [Line Items]
Short-term Debt	$ 302	$ 25
Debt Instrument, Interest Rate, Effective Percentage	0.15%	0.20%
Bank borrowings
Short-term Debt [Line Items]
Short-term Debt	$ 195	$ 77

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant